Pneumatic suction box for suction rolls



- April 7, 1931.' G. MILLER ET AL PNEUMATIC SUCTTON BOX FOR SUCTION ROLLS 4 Sheets-Sheet Filed Nov.

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April 7, 1931. G. MILLER ET A1. 1,800,149 v PNEUMATIC SUCTION BOX FOR "SUCTION ROLLS Filed NOV. 15, 1928 4 Sheets-Sheet 2 April 7, 1931. G M|l ER ET AL 1,800,149

PNEUMATIC SUCTION BOX FOR` SUCTION ROLLS Filed Nov. 16, 192e 4 sheets-sheet 4 4Z /Z v l L v w Z. 4/ 5v l /3 /5 @y 3/ l 49 f @l /5 Il( 4Q n.26 I

` nuca/jams ZT/f 67 I le? Patented Apr. 7, 1931 UNITED STATES PATENT- OFFICE GUYON MILLER AND ALBERT H. STANDLEY, F DOWNINGTOWN, PENNSYLVANIA, AS'- SIGNORS T0 DOWNINGTOWN MANUFACTURING COMPANY, OF .'DOWNINGTOWN, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA PNEUMATICI SUCTION BOX FOR S'UCTION RIOLLS g Application led November 16, 1928. Serial No. 319,824.

This invention relates to a suction roll for a paper machine, or other machines employing suction in any form, and is more particularly concerned with means for assuring contact between the suction box and the revolving shell of the roll. Such a machine is of utility in any of the textile, felt or allied industries wherein moisture is to be removed by suction.

An object of the invention is to provide a suction box having resiliently mounted packing strips.

Another object is to provide a suction box which will conform to any irregularity in the contour of the suction roll, throughout its length.

Another object is to dispense with mechanism in the interior of the suction chamber.

Another object isto provide a suction box from which the packing strips can be withdrawn from the end of the roll for-renewal without dismantling the roll and removing the suction chamber.

Another object is to provide a suction roll in which the adjustable deckles can be removed rom either end without dismantling the roll, the deckle packing strips having the same resiliency and adjustment as the longitudinal packing strips. 3o Another object is to provide a Huid-controlled, adjustable suction box.

Still another object is to produce a suction box with adjustable packing strips the adjustment of which is controlled by air.

`A further objectR is to provide means in a suction roll whereby access may be readily had to the interior.

A still further object is to produce a suction rol] characterized by the simplicity of its construction.

Yet another Objectis to produce a new and improved suction roll.

Other objects will appear hereinafter.

In the drawings which illustrate one form of my invention,

Fig. 1 is a longitudinal section through the left hand portion of a suction roll according to the invention Fig. 2 is a longitudinal section similar to Fig. 1 of the right hand portion of the suction roll;

Fig. 3 is a view on an enlarged scale taken along the line 3-8 of Fig. 1;

Fig. 4 is an end view of the structure shown in Fig. l;

Fig. 5 is a section taken along the line 5--5 of Fig. 1; FFig.. 6 is a section on the line 6-6 of Fig. 7 is a section on an enlarged scale taken along the line 7-7 of Fig. l and illustrating details, while Fig. 8 is a plan view of the coupling shown in Fig. 6.

The suction roll comprises a perforated shell 1 closed at each end by a head 2. Aa well understood, the shell 1 may be supported in any suitable manner as by bearings 3 and l1, lthe heads 2 preferably carrying integrally formed journals 5. The journals of course, may be attached to the heads 2 in any desired manner. Also carried by the bearings 3 and 4 are the hollow trunnions 6 and 7, eacho which at their inner ends act as closures for the suction box 8. The trunnion 6 extends through the journal 5, and is connected at its outer end to a suitably adjustable conduit or suction elbow 9 by means of which suction is applied `through the suction box 8 to the rotating shell 1.

As shown in Fig. 5, the suction box 8 comprises a rounded portion 10 having a plurality of upstanding arms 11, each terminating in a head 12 which carries the packing strips 13 in a manner to be hereinafter described. Loosely mounted on the floor ol the head 12 is atube-support 15 for carrying the pneumatic tube 16. This tube, when inflated, operates to lift the flexible holders 14 'for the packing 13 and functions to completely seal the suction box at all times. As will be readily understood, any wear will be assimilated entirely in the packing strips, which because of their resilient mounting will always be urged snugly against the interior of the rotating shell 1.

At each end of the suction box there is preferably mounted an adjustable decirle support 17 which, while it may be of ,any

'convenient construction, preferably takes the form shown in Fig. 7. Carried n the supports 17 are deckles 1 8 which are reciprocated through-'longitudinal paths by members 19 whichlare guided by shafts 21 y' and 22. The members 19 are provided in vin the recess 19a, the shaft 18a is free to move up and' down without danger of binding as would be'the case if the head 186 wereffixed'to the member 19. The opening 196 is provided to act as a vent between the cavity 190 and the recess 19a, thus preventing backpressure `from building up in the recess 19a. `The member 19 shown in Fig. 1 is actuated by a shaft 20, in the form of a sleeve fitting about a shaft 20a which actuates the rear member 19. As well understood, the position of the deckles determines the length of the suction box, and consequently the width ofthe paper produced. The shaft 20a may becarried by hangers 23 y and is preferably provided at' its left hand end with a hand-wheel 24, while the shaft 20 is actuated by a crank 25 by means of which they can be turned, either together or separately, to cause the threaded portions 26 and 27 to actuate the members 19. s

The crank 25 Jis preferably provided with extensions or arms 25a by m'eans of which the longitudinal displacement `of the rear deckle may be readily `determined from a scale back of the arms. f

The deckles 18 each carry a transverse packing strip 28 which cooperates to seal the ends of the suction box. Underneath the deckles are carried packing plates 29, which closethe openings 30 and 31 'in the deckle support 17, -as well as the .space between the4 support yand-the rib 32, which at each end of the roll joins-the arms 11 along the portions thereof which Idefine the travel ofthe deckles. While the plates 29v may be of any desirable material,- they are preferably formed of vulcanized rubber, `libre, or a phenol condensation product. The plates are shown as being secured by suitable means such -as screws 33'to thecdeckle support 17.*.

It willvbe noted froman inspection of Fig. 7 that the `packing holders 14, are prov vided on their adjacent faces with lugs 34 which engage with corresponding recesses in the deckle support 17. It will be readily seen that in this manner the deckle support 17 will be carried up and down along with shell.

the packipg holders 14, insuring engagement of the packing strips 28 with the-shell 1.

The tubes 16 which extend substantially the Afull length of the suction box are actu'- ated by any suitable means such as piping 35 on which may be mounted if desired, an air intake Vvalve 36, ressure regulator 37, and pressure gauge 3 The compressed air travels through pipe 39, to elbow 40,- f

and thence upwardlyto the union 41, where the flow is split into two'parallel paths. Eachn stream then passes through a section vided in the face of the nipple 43 for cooperation with the set-screw.

By this'construction, it is possible to readily remove a defective nippleA by merely of rubber tubing or' the like to a nipple 43.

backing' off the set-screw 49 and swinging I the yoke to such a position that 'the npple 43 can be removed. The use ofthe .valves 36 and 37, and gauge 38 lends a 'further advantage in that adjustment of the acking strips is effected by compresse controlled by the regulating valve 37, the pressure of which is indicated by the gauge 38; the compressed air chamber under the packing affording uniform adjustment and resiliency to the packing in contact with the inner surface of the revolving shell. 1

As shown in Figs. 1, 2 and 4, the heads 2 are provided with diametrically opposed openings 51 and 52, by means of which access may be had to the interior of the sucv tion roll.' Inasmuch asthere are no parts of the' mechanism on the interior of the roll, it can be washed down by suitableA or similar deposits on the interior of the Prior to such cleaning, the deckles 18 are removed through the openin and the packing strips 'displacedlongitu ally therethroughv to disengage them with the packing\holders 14, thus providing ready access tothe interior of the'shellf It will be seen that the packing strips 13 when worn, maybe quickly removed and replaced by new ones.. u

' One of the pedestals 53 on which are carried the bearings 4 is preferably provided with an arm 54,1pivotally mounted at 55 and adapted to hold the journals 6 of the suction box 8 stationary while the'shell 1 is rotating. The angle of the suction box Ato the vertical may be varied by means of the threaded arm 56 whichis pivotally connected at 55 to arm 54 and which is provided with stops 57 for limiting the travel of the arm 54.

With .this pneumatic adjustable suction box, the tension of the seal packing against air regulating valve and will be at all times indicated on the pressure gauge at the air intake.

This last feature is a very distinct advantage, as in all of the mechanically voperated adjustable suction boxes, there is no means of determining the amount of tension which is being exerted on the packing. If the vacuum on the roll falls, no matter from what cause, the tendency is 'to tighten up the packing which increases the power required to drive the roll and unnecessarily wears out the packing. In other words the stationary suction chamber may deflect due to its length orit may rise or spring upwards, due to excessivelyhigh vacuum, without in any way alecting the tension of the packing strips against the revolving shell.

As a result of the structure according to the above description, it is possible to keep the packing strips 13 and 28 uniformly pressed against the suction roll 1 throughout the entire length of the suction box. It is 4further possible to remove the strips 13 without dismantling thev suction roll, the strips being merely moved longitudinally of the su ports 14. A still further advantageous fldature has been pointed out, that the interior of the roll can be washed down through the openings 51 and 52. Yet another advantage is that the deckle and the longitudinal packing strips can be pressed as a unit against the interior wall of the shell 1.

It is of course understood that the invention is susceptible to numerous modifications and adaptations, and it is intended that it be limited only by the scope of the appended claims."

We claim:

1'. In a suction roll having a deckle and a suction box, packing strips for said deckle and said suction box, and means for resiliently pressing said packing strips against bars in which the strips are mounted and means engaging the bars for resiliently pressing said packing strips against the interior wall of said suction roll to seal the suction box and to compensate for irregu larities in the bore of the roll.

3. In a suction roll, a suction box in the interior of said roll, flexible packing strips on said suction box adapted to engage the interior walls of said roll and to seal said suction box, flexible bars by which said strips are carried and means engaging the bars for yieldingly pressing said strips against said wall with a pressure uniform throu hout the length of the strips to compensate tor irregularities in the bore thereof. v

4. In a suction roll, a suction box with longitudinally adjustable deckles mounted thereon carried in said roll, packing strips on said suction box and said deckles, flexible bars upon which said packing strips are carried, means engaging the bars for liftingy said deckles and said packing strips to resiliently press thepacking strips against the interior wall of said roll, and means for sealing the\ ends of said suction box when the deckles are lifted clear thereof. j

5.. In assuction roll, a suction box carried therein, longitudinally adjustable deckles loosely mounted on said suction box, packing strips carried by saidideckles and said suction box, flexible bars upon which said packing strips are carried, means engaging the packing strips for lifting said deckles and said packing strips to resiliently engage the packing strips with the interior wall of the roll, and sealing plates for sealing the ends of the suction box when the decklcs are lifted clear thereof.

6. In a suction roll having a rotatable outer shell having heads and a stationary suction box, means for compensating for wear between said shell and said suction box comprising packing strips loosely mounted in longitudinally extending upstanding arms of said suction box, said packing strips being removable through the ends of the arms and means connected with each of said arms for resiliently pressingl said packing strips against the interior wall of said shell, at least one of said heads having o enings permitting access to and removal o said strips.

7. In a suction roll having a rotatable outer shell and a stationary suction box, spaced upstanding arms mounted on said suction box and extending longitudinally of said roll, packing strips carried in saidv arms, longitudinally adjustable deckles carried between said arms adjacent the ends thereof and operatively supported by said packing strips, packing strips carried on said deckles, and means for resiliently lifting the first# mentioned packing strips and thereby said deckles so that all the packing strips yieldingly engage the inner walls of said shell.

and vertically adjustable alon 8. In a suction roll having a rotatable out# er shell and a stationary suctionv box, upstanding arms on said box and extending longitudinally of vsaid shell, packingstrips 5 loosely mounted in said arms, longitudinally l adjustable deckles carried between said arms 1;, suction box when the deckles are lifted clear thereof. '9. In a suction roll, an outer shell and a .stationary suction box having spaced upstanding arms extending longitudinally of said shell, means interco ecting said arms adjacent the ends thereo air tubes carried .by said arms, said tubes being seated on -loosely mountedvsu'pports, vertically adjustablel packing strips seated in adjustable g5 holders mounted above said air tubes, and

deckle supports carried by, the said vmeans with said packing strips, the air tubes being adapted to yieldingly press said packing strips .30 against the` interlor wall ofnsaid -shelland Mto lift deckles mounted on said supports so' that the) packing vstrips carried by saidl deckles w1ll also be yieldingly pressed against the said shell.

10. In a suction-roll having a rotatable outer shell and a stationary suction box spaced arms extending upwardly from saici` suction box, and means interconnectin said arms ladjacent their ends, longitudinal y exstripsthereon extending transversely of said f arms; said \air tubes being operable to lift said packingstrips to yieldingly engage the interior wall of said shell.

l2. In a suction roll having a rotatable outer shell and a stationary suction box, up-4 standing arms on said suction box and extending longitudinally of said shell, airP tubes carried in said arms, shouldered means mounted oneach of said tubes and being vertically adjustable, said means each carrying `a longitudinally extending packing strip, vertically adjustable deekle supports carried between said shouldered means adjacent the ends of said arms, and deckles carried by said supports, and having packing strips) thereon extending vtransversely of said vsuction box, said air tubes being adaptedfto lift said shouldered means and said deekle supports to -yieldingly engage the packing strips with the interior wall of said shell. v

13. In a suction roll having a rotatable outer shell and a stationary suction box, lupstanding. arms mounted on said suction box and extending longitudinally thereof, air tubes carried bly1 said arms fplrJ yieldinl en a in ac n stri swit t eintei'ioyi` wllgofgsgiddshll, arid meanslbc'omprisinga swinging yoke [for demountably engaging said air tube with an air line.

14. In a suction roll, a suction box in said roll having .upstanding arms extending longitu'dinally thereof, said arms terminating in longitudinallyl slotted heads, packing strips mounted in said slotted heads and being movable longitudinally thereof, and

headsclosing'the ends of said roll, one of said last mentioned heads4 being provided with an opening 'whereb access may be had to the interior of said ro l for removing said packing strips therethrough, j

15. In a suction roll, a suction box having 4D tending tubes mounted on saldmeans adj acent its extremities, longitudinally extending packi strips mounted above said tubes for vertica adjustment, shouldered holders f 4for carrying said packing strips, deekle sup- 45 ports mounted on said means and engaging said shoulders, deckles carried by said supports. and having packing strips mounted thereon, said air tubes, being operable to' lift said deekle supports, and both the lon,-v

50 gitudinally-exten'dmgand the deekle packlng strips to yieldingly engage them with the inner wall 'of said shell.

11 In a suction roll having a rotatable outer shell and a stationary suction box spaced arms extendin upwardly from said suction box substantially the full length vof said shell,'air tubes mounted in said arms, vertically adjustable vpacking strips carried above. said air tubes, and shouldered 60 means ittin over said air tubes for carryl' ing said pac 'ng strips, deekle supports extending between said shouldered means adjacent the ends of said suctionv box, said shouldered means having longitudinally -ex- 65 tending keys for engaging `corresponding an upstanding arm thereon terminatin in a longitudinally extending slotted Lhea a packing strip mounted in said slotted head and being movable longitudinallyL thereof, and heads closing the ends of lsaid roll, said heads each being provided with an opening whereby access may be had to the interior of said roll for removing said packing strips therethrough. v

"16.. In a suction roll, a suction box having packing strips mounted thereon and,f j

adapted for longitudinal movement along said suction box, deckles on said suction box, .andheads closing the ends of said roll, each head being provided with van opening whereby access may be had to the interior of said roll for removingy the adjacent deekle and the pack-ing strips therethrough. Ks-

17. In a suction roll, a suction box within the roll having longitudinally-extending arms, flexible packing means mounted in said arms and means urging the iexible packing means against the inner Wall of the roll with a pressure uniform throughout the length of the packing means.

18. In a suction roll, an outer shell, an interiorly-disposed suction box having longitudinally-extending arms, flexible pack ing means mounted oneach arm and movable toward the inner Wall'of the shell and fluid pressure means acting directly upon said flexible packing means to urge it toward the Wall of the shell.

19. In a suction roll, an outer shell, an interiorly-disposed suction box having longitudinally-extending arms, flexible packing means mounted on each arm and movable toward the inner Wall of the shell and fluid pressure means acting directly upon said flexible packing means to urge it toward the Wall of the shell, said packing ,means affording an area unbalanced to the suction created Within the box whereby the packing means is urged outwardly by said suction.

GUYON MILLER. ALBERT H. STANDLEY.. 

